Car roof



NOV. 22, 1932. Q D BNSALL 1,888,654

GAR ROOF Filed Fe'b. 26, 1931 2 Sheets-Sheet l .fl/6 H TToR/VEKS.

Nov. 22, 193,2. c. D. EsoNsALl.A 1,883,554

CAR RooF Filed Feb. 26,1931 z'sneets-sneet 2 ffIlll//l/llllllll/l/lIl/lln 111.11111111111111/11111111111111,11

Patented Nov. 22, 1932 Y y'UNITED"sin-arras PAT'NTFOFFIOYf v y ennemis DAVID BoNsALL, oF PITTSBURGH, rnNNsYIivANIA, AssIeNoa To P. H. MUR- PHY COMPANY, oF NEW' KENsING'rON, PENNSYLVANIA. A CORPORATION oirflrnisr#` SYLVANIA jcAR Roos o, i'

appncationmea Februaryae; 1931. vserial No. 518,432.

f This inventan relates to @er roofs ofthe type wherein the roof sheets areV arranged in upper and lower panels'securedin such.

manner as to act after the manner of a beam i supported on the side plates of the car. Its principal objects are to devise a'roof of this` type that will be strong, simple and permit the use of plain sheets of various widths and thicknesses. It consists `in the arrangements and combinations of parts hereinafter dey scribedand claimed. j a

lIn the accompanying drawings wherein like numerals refer to like parts Vwherever they occur,

, Fig. -1 is a plan view of a portion of a car roof embodying my invention,

Fig. 2 is an enlarged vertical transverse crosssection through one-half of the roof, the sectionV being takenthrough one Vof the upper-panels ont-he line 2 2 inV Fig. 2L

through-one of the' lower panels of vthe roof on the; line 3-3 inFig. 11, v,

Fig. 4 is a vertical longitudinalcross-se tion throughfthe roof on the line i-4 in Fig. 1 v A Y i Y Fig. 5 is an enlarged detailcross-sectional view showing'the manner of connecting the marginal portions of plain sheets andthe channeled sheets together and to the hollow reinforcing-member, l

Fig. 6 is a vertical longitudinal section through a modified roof construction pro-V vided with a strut that connects adjacent carlines and constitutes a 'loaddifting beam; and l Fig. 7 is a vertical cross-section on the line 7%7 in Fig. 6. y i 4In-thepresent construction, theroof com prises a series of channel-shaped metal sheets `1 that are spaced apart and extendfrom side .plate to side plate 2 of the ca r and are riveted or otherwise securedy thereto. Along the upstanding sides of such channel-shaped Y sheets are laterally extending flanges 3 which are lapped b v the margins of plain sheets 4 r4'disposed at a higher level than the body portions of the channel-shaped sheets; and the ends of said plain sheets are secured to the 5G side plates ofthe cari Underneath each lat# Awhose other side wall has a similar flange 7 Fig 3is a similar cross-section taken eral flange of the channelssha'ped roof-sheets is a lateral .flange 5 atthe top rof one sidewall of afchannelshaped reinforcing member 6,

abutting against the underside of the plain sheet. Y Each reinforcing-member is rigidly secured toadjacent roofsheet's by welding or preferably by av series of rivets, 8V extending Y vertically througheone of its flanges and the lapped margins of adjacent sheets andby a 59.!

second .row or series of rivets 9 extending ver` tically through its other flange and the body porti-on ofthe plain roofsheet.4 j A o The 'roof sheets arranged-*and joined to gether aslabove described mayv beconsidered il@ as a series of hollow ribs open at ythe bottom alternating with a series ofchannels Open at the top, the ribs corresponding wi-ththeV plain sheets and thechannelscorresponding' with the channehshaped sheets. -The hollow reinforcing members extend-from side plate` toside plate and, together withthe portions of the reef sheet above them, function ,after the manner of hollow box girder Carli-nes; and

it 4is Anoted `that such reinforcing `members .75 are all located in the hollow ribs of the roof, that is, underneath 'the plain sheets, andare lmainly orwholly between the upper and Y lower levels of the roof sheets. f Y

,As only alternate vsheets areV pressed orl `3fV flanged, there is no needfor fitting or adj ust:`

mentor special accura'cyin positioning any p of the sheets; the onlyre'quirement inthes respects ,which the plain sheets have to satisfy y is that they must be of proper width to span u the space between thechannel-shaped sheets and lap the langesthereof.` Thus, [it be-` comes feasibleto varyvthe sf'i'acingI of the channel-shaped sheets over"y aA considerable range. This is an advantage infconnection 90 .with new cars because it affords the designer considerablefreedom in conforming-his conh l struction to his Vcalculations of stresses bfrftov` V limitations imposed by features of the .frame-V work of the car. For instance, it permits th'e'use' of narrower plain sheets-and con- Y sequently more reinforcing members near the middle of J the car where the stresses are higher than at the ends ofthe car, or'wider than normal sheets at the middle ofthecar y worfelsewhere. if desired. Likewise, it permits the-use of thicker plain sheets at the middle than at the end of the car or thicker Vsheets at. one level (usually the upper) than at the other. Likewise, it facilitates Vrepair i of the roof away from Vthe home shops by' making -it practicable to use channel-shaped sheets of any width in cases where channelshapedsheets of desired width may not be available.. vIt is alsoV noted as a particular 'i advantage Iof having the reinforcing yribs under the upper panels, which function v.as

compression members of the roof considered as a beam, that the body portions of the channel-shaped sheets become tension mem-v l bersand may, therefore, be wider than would L tackle or devices-maybesecured.y l Prefer-V ordinarily v*be permissible for compression members! ofthe lsame width and thickness therewith The construction shown in Figs..6 and Tis similar to the construction hereinbefore ydescribed, with the' addition of members 10 located below the plain sheets with their ends v secured to adjacent' hollow ribsk These members serve as'struts to Vstiii'en the roof and aremade of such shape or otherwise adapted to serve as lifting beams to which lifting ably such members-are made in the form of an inverted vcliann'elwith lateral flanges or ribs adapted to be engaged'byslidable tongs or similar devices.

f What 'I claim is:

t. l. A c ar Yroofv comprising roofl sheetsfarranged to form panels at different levels with their side edges secured together, the' distance between the upper andlower lpanels being such t as -to develop substantial beam raction'in; said sheets and separate seam reinforcing 'members secured tothe underside of theupper sheets and substantially between the upper and lower levels V'ofthe sheets. '1 2. VA vcar roof comprising roof sheets arranged-to form panels at dierent levels with Vtheir-side edgessecured together, the distance f kbetween the upper and lower panels being such as to develop vsubstantial beam action insaid' sheets and. hollow seam .reinforcing members secured to the underside of the upper sheets and substantially between the upper and lower levels of the sheets.y p 3. 'A'car roof comprising a series of substantially 'plainV sheets alternating with a series ofsheets with raised'side margins that underlap the side margins of said iirst mentioned sheets, t and separate channel-shaped membersiwith one side margin underlapping Y' and rigidly secured tothe-lappedv margins of said sheets and with the other margin secured flatwise to the underside of said plain sheets. -f 4. A car roof 4comprising vsheets with jraised side margins having lateral flanges andsubstantially plainy sheetsA alternating with and overlapping said flanges, and channel-shaped members, underneath the ,upper sheets, said members having side margins underlapping and riveted'tc the lapped edges of the roof sheets andside flanges riveted to the upper sheets. v Y

e. Acarroof'comprising `a series ofsubstaiitially .plain sheets alternating with a series of sheets with raised sidemargins hav- A ing flanges that underlap the side margins of saidiir'st mentioned sheets,y and channelshaped membersV withlateralfflanges oneV of which underlaps and is rigidly secured'jtfi the lapped margins of said 'sheets' and the 'other lliange is secured flatwise to the underside -of shaped members being mainly: between the levels of the bodyl portionsA ofithe sheets of the two' series.;

alternating with and overlapping the raised 6. A car roof comprising sheets with raised Vside margins and substantially'plain sheets` 715 said4 first4 mentionedr sheets, said channelvmarginsxof saidfirst mentioned sheets, and

aV plurality, ofreinforcing members Vunder-V neath and secured toA theplain sheets. 7 A car roof comprising roof sheets-.ar-

ranged at divfierentlevels with their Vside edges secured together, ,separateseam rein-I forcing members secured to the underside of therupper sheets and substantially between the upper and lower levels of the sheets,y and members yconnecting the v reinforcing .members beneath the respectiveupper sheets and adapted-.to strengthen the roof and'constitute load-liftingfbeams Y A car roof comprising roof sheets arranged'to form panels at different levels withk theiry side edges secured together, the dis- 'v tance between the upper and lower panels being such as to develop'substantial.beam action in said sheets, separateseam reinforcing 9. A vcar roof comprisingfroof .sheets arranged at dierent levels with their side edges c secured together', separate seam reinforcing members securedto the underside of the -upper sheets 4and .substantially between the upper and lower levels of the sheets, and

Y strut members of inverted lchannel-shape located between said levels and lconnecting the reinforcing members beneath the respective ico upper sheets and Vadapted tofstrengthen thek roof land constituteload-lifting beams;` v n 1,0.'.A car roof comprising roof sheets arranged at' different levels'with their side edges.'` I secured together, separateseam reinforcing ymembers secured to the underside of the upper` sheets and substantially between the upper and lower levels of the sheets, and strut memiso v Cil . to each of said hollow ribs, and'members conbers connecting the respective reinforcing members beneath the respective upper sheets, said strut members being located substantial- V1y between said levels and being of inverted v channel-shape with lateral anges.

11.7A car roof comprising roof sheets secured together along their adjacent margins by hollow box seams, said roof having hollow ribs alternating with channels, and a plurality of separate reinforcing memberslocated beneath and rigidly secured to each of said hollow ribs. Y

12. A car roof comprising roof sleetssecured together along their adjacent margins,

said roof having hollow ribs alternating with channels, a plurality of separate reinforcing members located beneath and rigidly secured to eachy of said hollow ribs, and members connecting the reinforcing members beneath said ribs and adaptedto strengthen the constitute load-lifting beams.

13. A car roof comprising roof sheets sesured together along their adjacent margins,

said roof having hollow ribs alternating withv channels, a plurality of separate reinforcing members located beneath and rigidly secured necting the reinforcing members beneath said ribs and adapted to strengthen the roof and constitute load-lifting beams, said reinforcing members and said connecting members being located within said hollow ribs ,Substantially between the tops thereofand the bottoms of said channels.

14. A car roof comprising roof sheets secured together along their adjacent margins,

said roof having hollow ribs alternating with channels, and members located within said hollow ribs and extending transversely thereof and adapted to strengthen the roof and constitute load-lifting beams.

Signed at New Kensington, this 23rd day of Feb., 1931.

CHARLES DAVID BONSALL.

Pennsylvania,

roofk and 

